[vtkusers] Problem conversion vtkStructuredPoints to mesh/Polydata

[David Doria]

On Tue, Mar 27, 2012 at 3:30 PM, agatte <agatakrason at gmail.com> wrote:
> Hi ;)
>
> I am just begining my adventure with vtk.
> I have a  *.vtk file STRUCTURED_POINTS. I want to convert it to POLYDATA and
> save as *.vtk  file.
>
> Could anyone help me please ?
>
>
> I would appreciate for any help.
>
>
> I am trying with this code : but I received an error :
>
> int main()
> {
>
> try
> {
>         vtkSmartPointer<vtkStructuredPointsReader> reader =
>     vtkSmartPointer<vtkStructuredPointsReader>::New();
>     reader->SetFileName("Points.vtk");
>     reader->Update();
>
>    vtkSmartPointer<vtkGeometryFilter> geometryFilter =
>    vtkSmartPointer<vtkGeometryFilter>::New();
>        geometryFilter->SetInput(reader->GetOutput);
>        geometryFilter->Update();
>
>
>    /*vtkContourFilter * contour = vtkContourFilter::New();
>    contour->SetInput( reader->GetOutput() );
>    contour->SetValue(0, 128); */
>
>        // Save mesh as vtk Poly Data
>    vtkPolyDataWriter * writerMesh = vtkPolyDataWriter::New();
>        writerMesh->SetFileName("MeshVTK.vtk");
>    writerMesh->SetInput(geometryFilter->GetOutput());
>    writerMesh->Write();
>
>   // contour->Delete();
>        writerMesh->Delete();
>
> }
> catch (itk::ExceptionObject &ex)
> {
>   std::cout << ex << std::endl;
>   return EXIT_FAILURE;
> }
>
>
> }
>
>
>
>
>
> # vtk DataFile Version 2.0
> Comment goes here
> ASCII
>
> DATASET STRUCTURED_POINTS
> DIMENSIONS    3   201   1
>
> ORIGIN    0.000   0.000   0.000
> SPACING    1.000   1.000   1.000
>
> POINT_DATA   603
> SCALARS scalars double
> LOOKUP_TABLE default
>
> 108 186 26
> 1.081485e+002 1.858573e+002 26
> 1.083255e+002 1.855720e+002 26
> 1.085282e+002 1.851580e+002 26
> 1.087540e+002 1.846294e+002 26
> 109 184 26
> 1.092600e+002 1.832852e+002 26
> 1.095138e+002 1.825058e+002 26
> 1.097375e+002 1.816838e+002 26
> 1.099075e+002 1.808411e+002 26
> 110 180 26
> 1.100035e+002 1.791777e+002 26
> 1.099555e+002 1.783727e+002 26
> 1.099057e+002 1.775789e+002 26
> 1.099040e+002 1.767900e+002 26
> 110 176 26
> 1.102301e+002 1.752040e+002 26
> 1.105764e+002 1.744034e+002 26

What is the error you receive? Also, you should use
vtkXMLPolyDataWriter to write a .vtp file instead of using
vtkPolyDataWriter to write a .vtk file.

David